Lock.



LUCK.

v (Application mad Aug. 2o, 199s.)

l#Sheets-Shut l.

(No IIodel.)

Wtbzemzef,

ULS 11M.

no. 703,429. Mmmml my l, |902. C. KUN'ZELMANN.

LUCK.

(Application med lug. no, 189s.) (llo Model.) f 4 Sheets-Sheet 2.

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llo. 703,429. Patnted luly I, -|902.

C. KUNZELMANN.

LOCK.

(Application Bled Aug. 20, 189B.)

4 Sheets-Sheet 3,

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No. 703,429. Patented luly I, I92. C. KUNZELMANN.

Lock.

(Appliction med Aug. 20, 189B.)

4 Sheets- Sheet 4.

(lo Model.)

UNITED STATES PATENT OFFICE.

CARL KUNZELMANN, or scKINGEN, GERMANY.

LOCK.

SIPEGIICATION forming part of Letters Patent No. 703,429, dated July 1, 1902.

' Applicant tied August zo, 189s. serial No. Gamez. (no maar.)

To all whom/ it may coli/cern@l Be it known that I, CARL KUNZELMANN, a. subject of theGrand Duke of Baden, residing at Sckingen, in-theGrand Duchy of Baden, in the Germam Empire, have invented certain new and usefullmprovements in Lock ing Devices forDoors andthe Like, (forwhich I have applied for patent 4in "England, dated July 18, 1898,) of which the following is a specication. t 'A This invention relates to locking devices for doors and the like, the obj ect being to provide a'lock whichcannot be opened by unauthorized persons; Aand it consists of the arrangement of parts and the details of construction which I will now proceed to-describe, reference being had to Vvthe accompanying: drawings and to the letters and iigures marked4 thereon. v 'j Like characters refer to like parts in the various figures.

Figure 1 shows the lock with all its parts opened-z'. e., wi th the bolt drawn back. Fig. 2 shows the lock'with all its parts lockedi..

c., with the bolt pushed forward. Fig. 3 shows'- the key when its pin does not protrude. Figs.-

4, 5, and 6 show a safety device for the bolt? of the lock, Fig. 4 being a front view-,of the: bolt and safety device, Fig. 5 a rear view thereof, and Fig. 6 a sectional View on the line a", a: of Fig. 4. Figs. 7 to 11"show the arrange'-v ment of the device fr securing the levers or. plates, Fig. 7 being a front view of the parts when locked, Fig. 8a rear view thereof,Fig. 9 a view of the parts with the securingfd'e-v vice disengaged, Fig. 10 a rear viewofthe same, and Fig. 11 a side View thereof. Figs. 12 vto 16 show an arrangement for closing and locking the keyhole,`Fig. 12 being a view of4 the parts when the keyhole is closed, Fig. 13, a view of the parts when the keyhole is open--Y t'. e., when the .hole'injthe covering-plate of'` the keyhole correspondswith the latter, so that the key can be inserted? Fig. 14 is a vertical sectionalview on the line y y of Fig. 13. Fig. 15 is a detail viewof the keyholecovering plate, and Fig; Y16 a view of the key for thisarrangement. Figs. 17 and 18 are'enlarged sectional views of the key of my improved lock, Fig. 17 showing the pin in normal position and Fig.' 18 when protruding the front and back of the casing.

- smoothly past the same.

over the bit. Fig. 19 is a detail View of the catch-locking device'.

The casing of the lock consists ofthe frame D and the plates 'B and C, the latter forming Frame D is provided with a number of lugs A, to which the plates B and C are secured by screws.

E and Gr represent two pins projecting from the plate Band serving to support the bolt R. The bolt R is a flat bar of iron of suitable form and is provided-with slots for the pins E and G. In' the lower edge of this bar a number of rectangular recesses are made. The projecting pieces 1 and 11, formed on the 4bolt between the recesses, together with a projecting piece 111, furnish a hold for the bit of the key, hereinafter described, by which the bolt R can be moved backward and forward. The edgesof these projections are so shaped that the bit of the key may move The projection marked 111 is situated on a piece r', pivotally secured to the bolt R and movable in the direction of the arrowIV. This piece r' is held in the position shown in Fig. 1 by a spring T7.

-In this position of, the piece r' the projection -111 is used for opening the lock. A projec- .tion r3, likewiseon the piece r', is provided to enable the displacement of the'projection 111 quite out of the reach of the key by the last half-revolution of the same, Fig. 2, and thus prevent the opening of the lock by any unauthorized person.l The piece r' is held in this position by the nose g4 on a plate-spring q2, secured to the bolt R; This nose (fis pressed down on turning this piece r' and springs up beneath the part 1'4 when it has been raised far enough. To enable the return of the piece 1" into the position shown in Fig. 1, the

plate-q, which is secured tothe bolt R and supports the piece `r', is provided with a hole (j, through which apin can be placed. lThe pin is provided in the ,interior of the principal key, from whichit can be maderto pro- -ject by the means described below and press back the spring q'having the nose Q4, so that the part r4 is released, and. the piece r springs back into the position shown in Fig. 1 under,

IOO

the action of the spring T7.

On the pin E four tumblers e', z2, z3, and Z4, Fig. 11, are arranged on the front of the bolt R. These tumblers are each provided with three slots the direction of the length of which is concentric to the pin E. A horizontal slot connects these concentric slots together. Within. these slots a piu V is arranged, and at every revolution of the key which raises the tumblers, as well as moves the bolt, the pin Vpasses from one slot to the other. The tumblers z', the., are so pressed downward by a spring VI that the pin V is normally situated in the vertical slots. On the end of each tumbler opposite to that of the pin E there is a rectangular slot, into which the nose a of a catch-piece a engages for the purpose of preventingr the raising of the tumblers, or, in other words, to prevent the locking or unlocking of the lock. The catch-piece ct/ is of bell-crank form and rotates about the pin VII, secured to the plate P, which carries the hollow pin b2, that guides the key. The free end of the part a2 of the catch-piece a behind the Xed plate p is provided with a nose a4, on which the spring p', which islikewise txed to the plate p, presses. In the plate p a slot psis provided concentric to the pin b2, through which the pin m, Figs. 17 and 18, when pressed out of the key can be passed. If now the catch-piece a is to be released-as, for example, in order to release the tu mblers z' z2, &c.-the extreme outer end of the part a2, arranged underneath the plate P, is pushed aside or upward by a pin m, which, as will be described below, may be made to project from the key by pressing on the top of the latter. The edge of the nose a4 of the catch-piece a2 is caught bythe spring p, so that the automatic return of the catchpiece a2 a', which is under the influence of the spring a3, is impossible. Vhen it is desired to cause the catch-piece a' to spring back again, it is only necessary to press back the spring p' by the pin in the key, as by this means the edge of the spring )7' then releases the edge of the nose ai.

The end of the longer arm of a lever f3, pivoted on the pinf4, secured to the partZ of the bolt R, engages in a correspondinglyformed hole of the boltf, which represents the common catch. On turning the key the bit of the same presses the partf5 ot' the shorter arm ot this lever f3 upward. By this means the boltj' is drawn back and enables the opening of the door. One end of the bolt f passes through the side of the casing and is provided with a handle XII and is normally held in the position shown in Fig. 1 by the spring XI. In this position the door is kept closed. The boltfis further provided with a transverse groove or notch at a suitable position, into which a lever e can engage and prevent the movement of the same. Said lever is pivoted at one end to the side of the casing and can be turned by the knob e3, situated without the casing.

To the back B of the casing a spring b3 is secured, having a suitable form and provided with holes b4 and likewise with a pin Z. This spring further supports a pin b, guided in the hollow pin' b2, and by pressing on the pin b' the spring b3 can accordingly be pushed backward. A pin ro engages in the holes b4 and b5 in the closed and opened position of the lock, respectively. By pressing back the spring b3 the pin r@ can be released from the holes b4. On the inside of the front plate C there is a plate c, pivoted on a pin and held in the closed position by the spring c2 and provided with a keyhole, Figs. 12 and 13. This plate has a projection c3, the front projecting edge ot which is moved behind and held by the edge XIII ot the pin Zi on the be fore-mentioned spring b3 when the plate o is turned for the purpose of revealing the keyhole.

On the outside of the front plate C there is a key-guide t', the plate-shaped end of which is hollow and contains a disk t3, carrying a pin i4. This plate i3 has a hole 2, corresponding in shape with the key. The pin i passes through the front plate C and moves in a slot in the latter, so that on turning the disk the end of the pin 724, projecting through the front plate C, moves the plate c until the keyhole in the same coincides with that in the front plate, whereupon the upper edge of the part c3 springs behind the edge of the pin tu. The first key for opening the keyhole is consequently provided with a ilat bit and is so constructed that when inserted into the sleeve t' it lls out the cnt-away portion of the disk t and rotates the latter on itself being rotated.

The principal key for the lock consists of a hollow shank M2, on the one end of which the bit m3, of a form to tit the tumblers .2", dsc., is provided, whereas the other end is furnished with a thread on the outside, onto which the part M is screwed. Between the part M and the shank M2 a plate m6 is placed and serves as support for the spiral spring m4, arranged within the sleeve m5, supporting the pressurebutton fm. The pin on', which is movedout of the bit m3 on pressing upon the button m, is secured to the sleeve m5. A sleeve n0, guided in the shank M2 by a pin n2, holds the pin a'. This sleeve no can be so moved by the ring D, likewise secured to the pin n2, that the free end of the pin n is moved out of the key. The sleeve a5 in the shank M2 supports the spring n, by which the pin n is normally kept within the bore.

The lock is operated in the following manner: The iirst key, Fig. 1G, is inserted into the part t' and the disk t3 turned to the right, Fig. l2. By this means the plate c is moved aside and held in the new position by the pin Z3 of the spring b3. The principal key is then used. This key is turned in same direction as the first key, and the button m is pressed at the same time. By reason of the pressure on the button m the pin m of the key passes through the slot p3 in the plate I), engages the end IX of the catch-piece a', and so turns IOO IIC

tion of the spring.

the same that the parteJ is moved out of the transverse groove z in the tumblers-z rbc. On turning the catch-piece 0.1 the nose a4 is caught by the `edge of the spring p and the return of the catch-piece is prevented. The ring n of the key is now pressed forward, and the pin fn' of the key will then press back the spring h3, which holds the pin ro of the bolt R, release this bolt, so that upon again turning the key the bolt can be moved out. Two revolutions of the key are made to throw the bolt, the tumblers being. raised by the parts I, 2, 3, and 4 of the key and the bolt .being actuated by the part 5. bolt R enters into the hole b4 in the spring b3. By turning the key again for a half-revolution -to the right the piece r' is moved upward by the pressure of the bit of the key against the projection IV, and it is held in this raised position by the nose Q4 of the spring q2. In this position the return of the bolt R is impossible. Now by again pressing lon the button fm of the principal key the pin m of this key lis so inserted through the slot p3 of the plate p that the spring p is displaced, thus releasing the nose a4, whereupon the part a of the catch-piece a can spring into the transverse groove e in the tumblers z z2, duc., and so lock them. Before withdrawing the key the spring b3 is pressed back by pushing on the ring n or pin m of the key and the pin i3. This releases the projection e3 on the plate c, so that upon withdrawing the key this plate c again closes the keyhole. For the purpose of opening the lock the keyhole is first opened by means of the preliminary key. When this has been done, the catch-piece a is turned back by means of the pin m', provided in the bore of the principal key. By pressing out the pin n, likewise provided in the principal key, the free end of the said pin will pass through the hole q of the plate q as soon as the correct position is reached and press back the spring p.- The nose g4 then releases the part r4 of the piece ro, and this latter returns into the position shown in Fig. 1 under the ac- After now pressing back the spring b3 and releasing the pin fr0 of the bolt R by means of the pin n' in the principal key the bolt can be pushed back again by turning the key twice. The pin r@ then enters into the second hole b4. brought into engagement in theknown manner, and finally by pressing the pin fn' onto the spring b'the keyhole of the lock will be closed on the removal of the key. Owing to the proportionately large number of safety oontrivances, this lockis especially suitable for the doors of safe rooms and the like.

Having described my invention, I claim- 1. In a lock, the combination of a sliding I bolt, a spring-plate located adjacent thereto,

a hollow key-guide, a pin carried by said springaplate and projecting into said hollow key-guide, a pin or detent carried by said bolt, and holes or recesses in said spring-plate adapted to receive said detent and hold said The pin ro of theY The catch-piece a is ,held against movement, and means, adapted to be controlled'by a suitable key, for removing saidvdetent `from said tumbler plate orplates, thus disengaging the latter fromthe bolt whereby said bolt may be moved. j

3. In a lock, the combination of a sliding bolt having a projection thereon, a movable tumbler plate or plates having notches therein, the said projection being normally adapted to engage one or the other of. said notches and so hold-said bolt against movement, a

rocking lever adapted to engage and disengage said tumbler plate or plates and permit or prevent movement of the same,`a projection carried by said lever and a spring-plate adapted to engage said projection when said lever is disengaged from the tumbler plate or plates. Y

4. In a lock, the combination of a sliding bolt, a projection thereon, a pivoted tumbler plate or plates, notches therein, the said projection being adapted to engage one or the other of said notches, a bell-crank lever having a detent adapted to normally engage with said tumbler plate or plates and prevent ,movementof the latter, and means controlled by a suitable key whereby the said bell-crank lever may be moved and held in disengagedV relation to saidk tumbler plate or plates so that the latter may be moved to release the bolt. I

5. A locking device for doorsand the like, comprising a key having a bit and a moving pin guided obliquely therein, kintermediate securing devices between the bolt and the key, and a safety device with means for arresting it to prevent the movement of said intermediate securing devices when locked, said pin being adapted to engage the safety device; substantially as described.

6. A locking device for doors and the like, comprising a key having a bit, a moving pin guided obliquely therein, intermediate securing devices between thev bolt land the key, and a safety device swinging in a recess of .the bolt, and anarresting mechanism having a plate provided .with a projection protruding into the path of the safety device, said plate being Xed elastically to the back of the'bolt, so that it can be pressed back .by means of the pin, substantially as described.

In testimony whereof I have hereuntosety my hand in the presence of two witnesses.

CARL KUNZELMANN. Witnesses:

A. M. LIEBERKNECHT, .TEEN SCHNEIDER. 

